HTC EVO 4g (2010 Model) Power Button - HELP!!!

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http://forums.androidcentral.com – Hey, so my power button has recently become unresponsive. It has gradually gone "into" the phone, causing it harder to press but it has not jammed. Would this be a fixable problem or would I have to take it into a HTC store and have them look at it? The first time it happened, I was able to push my fingernail away from the screen in-between the power button allowing the power button to work again. But now, no matter what I do, it will not work. Thanks for the help in advance! Please help because it's making things very difficult. (HowTos)